Unable to open any domain in Plesk after Monitoring extension update to 2.9.1: Cannot destructure property 'screenshotUrl' of 'data.site' as it is null

Symptoms

• Monitoring extension has been updated to version 2.9.1.

• While in Power User view for Plesk, an attempt to open a Domain card by going to Websites & Domains returns the following error:
  

  PLESK_ERROR: Internal server error

• When opening any domain card in Plesk, the page fails to load with one of the following error messages:

  PLESK_ERROR: Cannot destructure property 'screenshotUrl' of 'data.site' as it is null.

  ---

  PLESK_ERROR: TypeError
  data.site is null

• When opening Monitoring > Websites, the following message appears:

  PLESK_ERROR: Request failed with status code 500

• The following error message is logged in /var/log/plesk/panel.log: 

  CONFIG_TEXT: ERR [extension/monitoring] /usr/local/psa/admin/plib/modules/monitoring/library/Helper/CloudWebsite.php(43): Typed property PleskExt\Monitoring\Helper\CloudWebsite::$monitorsMap must not be accessed before initialization

Cause

Resolution

Workaround

If update is not possible for some reason you may try the following